The term 'Seashore Phenomenon' can be summarized by the word 'TIDE', which is a four letter word. Tides are the regular rise and fall of sea levels caused by the gravitational forces of the moon and sun, and the rotation of the Earth. Tides occur twice a day, and the height of the TIDE varies depending on the location. Tides are important for coastal navigation, fishing, and other activities that take place near the shore.